Risk Evaluation System Research Of One Bridge Construction

In recent years,sustained and rapid economic development,increasing the degree of modernization,China's increasingly dense traffic network and improvement of roads extending in all directions.In order not to affect the normal use of the operating road,project construction process is irreversible,a one-time construction tasks,need in a certain period of time according to certain procedures for construction.Requires a form of bridge construction for the construction of flyover engineering become more and more.Of bridge engineering as a large construction project,there are all kinds of risks in the process of construction,the relationship between the various risks is very complex,especially in the process of construction of the construction scheme,a large number of new construction technology,the use of technology,the more increase the possibility of risk.Before enter the formal construction of the bridge,to deal with the whole construction project risk evaluation,and make effective according to the results of the risk assessment,risk prevention and control measures to ensure orderly sequences of bridge construction,the safety of construction personnel and construction equipment,so that the risk of loss to a minimum.Therefore,the safety of bridge construction risk analysis has important practical significance.Based on this study a large number of references in reading and learning,this paper expounds the engineering construction risk analysis theory including risk characteristics,measures,etc.,as well as the risk of bridge construction has carried on the theory in this paper.Through the results of engineering construction risk and the in-depth study of bridge construction,select the typical of risk and risk source of bridge engineering construction,At the same time introduces the information entropy,to evaluate the credibility of the experts,and then,make the decision result more scientific;To improve the risk matrix analysis method,focusing on the risk probability and risk loss at the same time,also considering the frequency of risk,and based on the above three risk factors to build the 3d model of bridge construction risk assessment;Finally to across the shanghai-nanjing highway bridge as anexample to verify the build of the feasibility of the model of risk evaluation of bridge construction.